To supplement their own products with products they did not have/make. Also to on-trade them to other areas.
h
To use and consume the products, and use the slaves. However the trade they profited most from was the carriage trade - taking goods and slaves between other places and making a handsome profit on the resale transaction.
There are several things that an immigrant would bring to remind them of their homeland. Some of them include photos, cultural artefacts and other minerals that are found in their homeland.
Imports
What religion did the traders bring to the people of Ghana and Mali
They brought it by boat.
by buying them from African slave traders
Traders would bring salt to Ghana and other things of intrest, mostley salt was traded for gold during the period of trade,
water
Most importantly, their religion Islam
Salt
because they get benifited as the traders who are passing by should pay the tax and some times the traders bring gifts for them.
Homeland protest and perhaps they were smarter than the US.